let array = ['geeks', '4', 'geeks'];
 
// Accessing array elements one by one
console.log(array[0]);
console.log(array[1]);
console.log(array[2]);

geeks
4
geeks

let array = [1, 2, 3, 4, 5, 6];
 
for (let index = 0; index < array.length; index++) {
    console.log(array[index]);
}

1
2
3
4
5
6

let index = 0;
let array = [1, 2, 3, 4, 5, 6];
 
while (index < array.length) {
    console.log(array[index]);
    index++;
}

1
2
3
4
5
6

let index = 0;
let array = [1, 2, 3, 4, 5, 6];
 
array.forEach(myFunction);
 
function myFunction(item, index) {
    console.log(item);
}

1
2
3
4
5
6

let x = 0;
let array = [1, 2, 3, 4, 5, 6];
 
const under_five = x => x < 5;
 
if (array.every(under_five)) {
    console.log('All are less than 5');
}
else {
    console.log('At least one element is not less than 5');
}

At least one element is not less than 5

let x = 0;
let array = [1, 2, 3, 4, 5, 6];
 
let square = x => Math.pow(x, 2);
 
square = array.map(square);
 
console.log(array);
console.log(square);

[ 1, 2, 3, 4, 5, 6 ]
[ 1, 4, 9, 16, 25, 36 ]

let array = [1, 2, 3, 4, 5, 6];
 
let even = x => x % 2 === 0;
let evens = array.filter(even);
 
console.log(array);
console.log(evens);

[ 1, 2, 3, 4, 5, 6 ]
[ 2, 4, 6 ]

let array = [1, 2, 3, 4, 5, 6];
 
const helperSum = (acc, curr) => acc + curr;
 
const sum = array.reduce(helperSum, 0);
 
console.log(array)
console.log(sum);

[ 1, 2, 3, 4, 5, 6 ]
21

let array = [1, 2, 3, 4, 5, 6];
 
const lessthanFourCheck = (element) => element < 4;
const lessthanFour = array.some(lessthanFourCheck);
 
console.log(array);
 
if (lessthanFour) {
    console.log("At least one element is less than 4")
} else {
    console.log("All elements are greater than 4 ")
}

[ 1, 2, 3, 4, 5, 6 ]
At least one element is less than 4